EP0580977B1 - Device for spinning synthetic yarns - Google Patents

Device for spinning synthetic yarns Download PDF

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Publication number
EP0580977B1
EP0580977B1 EP93108161A EP93108161A EP0580977B1 EP 0580977 B1 EP0580977 B1 EP 0580977B1 EP 93108161 A EP93108161 A EP 93108161A EP 93108161 A EP93108161 A EP 93108161A EP 0580977 B1 EP0580977 B1 EP 0580977B1
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EP
European Patent Office
Prior art keywords
cooling tube
air
cooling
yarns
spinneret
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP93108161A
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German (de)
French (fr)
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EP0580977A1 (en
Inventor
Heinz Dr. Schippers
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Oerlikon Barmag AG
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Barmag AG
Barmag Barmer Maschinenfabrik AG
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    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/08Melt spinning methods
    • D01D5/098Melt spinning methods with simultaneous stretching
    • DTEXTILES; PAPER
    • D01NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01DMECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00Formation of filaments, threads, or the like
    • D01D5/08Melt spinning methods
    • D01D5/088Cooling filaments, threads or the like, leaving the spinnerettes
    • D01D5/092Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys

Definitions

  • the invention relates to a device for spinning man-made fibers according to the preamble of claim 1.
  • This spinning device is known from DE-A 19 14 556.
  • it has the advantage that the fiber bundle, which consists of a large number of individual filaments, is subjected to an air flow over its entire circumference.
  • uneven thread properties arise. This unevenness may be due to the fact that the chemical fibers running at very high speed and at the same time very high thread tension only become uniform over their length if the running smoothness is very great.
  • air turbulence in the spinning chamber which leads to pressure fluctuations on the outer jacket of the cooling tube, also results in an uneveness of the filaments or threads produced. This is especially true when the spinning device is operated at a very high winding speed. Because this creates very strong air movements.
  • EP 0 117 215 B1 and EP 0 118 375 B1 disclose spinning devices whose winding machine, with which the chemical fibers are wound into bobbins, are arranged at a short distance below the spinneret. This is made possible by the fact that Chemical fibers at a very high speed of more than 6000 m / min. be wound up. This results in a very intensive cooling of the threads, so that a very short cooling zone of about 2 m is sufficient, while cooling zones of more than 4 m are required in conventional spinning systems. As a result of the high speed, there is very strong air friction, so that the chemical fibers are wound up more or less completely stretched.
  • the man-made fibers can be drawn off from the spinneret directly by pulling the take-up spool.
  • a delivery mechanism can also be provided between the spinneret and the winding device, in particular a slip conveyor mechanism according to DE patent application P41 35 350.1, published in EP 0 539 866 A.
  • porous or perforated cooling tubes have previously been used, which are the subject of DE-A 34 06 347 (Bag. 1326) and DE-A 34 24 253.8-26 (Bag. 1419) ) are. Reference can also be made to DE-A 37 41 135 (Bag. 1558) and DE-A 39 23 067 (Bag. 1648).
  • the cooling air is supplied in a defined manner by a blower, so that the air flow supplied to the cooling pipe can be largely homogenized in terms of space and time.
  • a disadvantage of this latter blowing technology is that complex apparatus and procedural measures are required in order to achieve a time-uniform and, over the length, very even, ie, vortex-free, air flow onto the chemical fiber bundle.
  • GB-A-1,088,240 discloses a method for spinning a fiber-forming polymer, in which internals are provided in a cooling tube provided under the spinneret for calming the air flow drawn in.
  • the object of the invention is to design the known spinning device so that a simple the chemical fibers run smoothly and chemical fibers with great longitudinal uniformity are produced.
  • the radial air flow is generated in that the chemical fibers running at high speed create a negative pressure in the tube.
  • the invention enables good flow and cooling conditions to be set with little effort.
  • the measure according to claim 3 is also used. These measures not only prevent the air vortices entrained by the fiber bundle from flowing back into the area of the cooling tube and leading to an uneven exposure of the cooling tube to atmospheric air. Rather, it also prevents pressure fluctuations and pressure waves from propagating into the intake area of the cooling tube.
  • the proposed air box is connected to the atmosphere.
  • the air box is designed so that there is essentially atmospheric pressure or vacuum.
  • defined openings can be provided at one or more points.
  • An intermediate wall can be used to prevent the inflowing air from acting directly on the outer circumference of the cooling tube.
  • the air box can be penetrated by a plurality of cooling tubes, each of which is assigned to a spinneret. This makes it possible to produce the same cooling conditions for the majority of the cooling tubes and in this way to one another to produce the same and uniform chemical fibers.
  • the air box is not connected to a blower with which an air pressure, albeit low, is generated in the air box. Rather, the fact that a pressure gradient arises which is directed from the spinning chamber into the air box and from there into the cooling tube is used for the air supply.
  • Measures can be provided to direct the air currents drawn into the cooling tube from the outside in. This can be done in particular by guide rings which are attached to the inner wall of the cooling tube in one or more normal planes and are directed essentially radially inwards. Of course, these guide lines leave a passage opening for the chemical fiber bundle in the center of the cooling tube. In the embodiment according to claim 3, in addition to the appropriate deflection of the air flow, a vacuum is also created on the underside of the guide rings, which leads to pre-suction of the outside air.
  • the invention is described below using exemplary embodiments:
  • a polymer melt is fed through a melt line 1 to the so-called spinning head 2.
  • the spinning head 2 contains in particular a (not shown) spinning pump, through which a metered amount of the melt is fed to the spinning nozzle 3.
  • the spinneret 3 is a plate with a plurality of outlet bores.
  • a filament 4 emerges from each outlet bore.
  • the filaments 4 are combined into a thread by a thread guide 7.
  • a traversing device 8 - here designed as wing traversing with a guide line - the thread is fed to the take-up spool 10 with a partial wrap around a measuring roller 9.
  • the take-up spool 10 is formed on a winding tube 12.
  • the winding tube 12 is clamped on a rotatably driven spindle 11.
  • four sleeves 12 are clamped on a spindle 11 and at the same time four threads are wound up to form a bobbin 10.
  • the filaments 4 are initially in the open state, ie. H. in front of the thread guide 7, are passed through a cooling tube 5.
  • the cooling tube 5 connects directly to the spinneret 3.
  • the cooling tube 5 is porous. It has a length of 0.5 to 2.0 meters.
  • a shielding plate 6 is applied at the outlet end of the cooling tube 5.
  • the shielding plate 6 has a passage opening for the filament bundle, the width of which is equal to or less than the inside width of the cooling tube 5.
  • the porosity of the cooling tube 5 increases in the direction of the thread.
  • the porosity is essentially proportional, but at least depends on the thread running speed.
  • the porosity can also be adapted to the temperature profile that the filaments have over their length. In both of the cases described, the porosity increases in the thread running direction, ie the air permeability increases.
  • the exemplary embodiment according to FIG. 1 has the special feature that a large number of guide rings 17 are arranged in the cooling tube.
  • the guide rings 17 are annular sheets. These annular sheets are fastened with their outer circumference to the cooling tube 5 and point with their inner edge in the thread running direction, that is to say they are inclined downwards. These guide rings 17 guide the sucked-in air currents downward, but also cause a negative pressure to develop beneath them, so that this results in a suction effect.
  • the thread speed is more than 6000 m / min.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Spinnen von Chemiefasern nach dem Oberbegriff des Anspruchs 1.The invention relates to a device for spinning man-made fibers according to the preamble of claim 1.

Diese Spinnvorrichtung ist bekannt durch die DE-A 19 14 556. Bei dieser Ausführung hat man zwar einerseits den Vorteil, daß das Faserbündel, das aus einer Vielzahl von einzelnen Filamenten besteht, auf seinem ganzen Umfang mit einer Luftströmung beaufschlagt wird. Es hat sich jedoch herausgestellt, daß ungleichmäßige Fadeneigenschaften entstehen. Diese Ungleichmäßigkeit dürfte darauf zurückzuführen sein, daß die mit sehr hoher Geschwindigkeit und gleichzeitig sehr hoher Fadenspannung laufenden Chemiefasern nur bei sehr großer Laufruhe über ihre Länge gleichmäßig werden. Weiter ergibt sich als Nachteil, daß Luftturbulenzen des Spinnraumes, die zu Druckschwankungen auf dem Außenmantel des Kühlrohres führen, auch eine Ungleichmäßigkeit der erzeugten Filamente bzw. Fäden zur Folge haben. Das gilt insbesondere dann, wenn die Spinnvorrichtung mit sehr hoher Aufspulgeschwindigkeit betrieben wird. Denn dadurch entstehen zum einen sehr starke Luftbewegungen. Zum anderen ist lediglich eine sehr kurze Kühlzone erforderlich, so daß Druckschwankungen der als Kühlluft angesaugten atmosphärischen Luft mit entsprechender Verstärkung zu Qualitätsschwankungen des Fadens führen. So sind z.B. durch die EP 0 117 215 B1 und EP 0 118 375 B1 Spinnvorrichtungen bekannt, deren Aufwickelmaschine, mit welcher die Chemiefasern zu Spulen aufgespult werden, in geringem Abstand unter der Spinndüse angeordnet sind. Das wird dadurch ermöglicht, daß die Chemiefasern mit sehr hoher Geschwindigkeit von mehr als 6000 m/min. aufgewickelt werden. Dadurch ergibt sich zwar eine sehr intensive Kühlung der Fäden, so daß man mit einer sehr kurzen Kühlzone von ca. 2 m auskommt, während in konventionellen Spinnanlagen Kühlzonen von mehr als 4 m erforderlich sind. Infolge der hohen Geschwindigkeit ergibt sich eine sehr starke Luftreibung, so daß die Chemiefasern mehr oder weniger vollständig verstreckt aufgespult werden.This spinning device is known from DE-A 19 14 556. In this embodiment, on the one hand, it has the advantage that the fiber bundle, which consists of a large number of individual filaments, is subjected to an air flow over its entire circumference. However, it has been found that uneven thread properties arise. This unevenness may be due to the fact that the chemical fibers running at very high speed and at the same time very high thread tension only become uniform over their length if the running smoothness is very great. Another disadvantage is that air turbulence in the spinning chamber, which leads to pressure fluctuations on the outer jacket of the cooling tube, also results in an uneveness of the filaments or threads produced. This is especially true when the spinning device is operated at a very high winding speed. Because this creates very strong air movements. On the other hand, only a very short cooling zone is required, so that pressure fluctuations in the atmospheric air drawn in as cooling air, with corresponding reinforcement, lead to fluctuations in the quality of the thread. For example, EP 0 117 215 B1 and EP 0 118 375 B1 disclose spinning devices whose winding machine, with which the chemical fibers are wound into bobbins, are arranged at a short distance below the spinneret. This is made possible by the fact that Chemical fibers at a very high speed of more than 6000 m / min. be wound up. This results in a very intensive cooling of the threads, so that a very short cooling zone of about 2 m is sufficient, while cooling zones of more than 4 m are required in conventional spinning systems. As a result of the high speed, there is very strong air friction, so that the chemical fibers are wound up more or less completely stretched.

Die Chemiefasern können unmittelbar durch Zugkraft der Aufwickelspule von der Spinndüse abgezogen werden. Es kann jedoch auch zwischen die Spinndüse und Aufspuleinrichtung ein Lieferwerk vorgesehen sein, insbesondere ein Schlupflieferwerk nach der DE-Patentanmeldung P41 35 350.1, veröffentlicht in EP 0 539 866 A.The man-made fibers can be drawn off from the spinneret directly by pulling the take-up spool. However, a delivery mechanism can also be provided between the spinneret and the winding device, in particular a slip conveyor mechanism according to DE patent application P41 35 350.1, published in EP 0 539 866 A.

Man hat zur Vermeidung von Qualitätsschwankungen bei der Abkühlung der Fäden unterhalb der Spinndüsen bisher poröse oder perforierte Kühlrohre verwandt, die beispielsweise Gegenstand der DE-A 34 06 347 (Bag. 1326) und der DE-A 34 24 253.8-26 (Bag. 1419) sind. Ebenso kann auf die DE-A 37 41 135 (Bag. 1558) sowie die DE-A 39 23 067 (Bag. 1648) Bezug genommen werden. Hierbei wird die Kühlluft jedoch definiert durch ein Gebläse zugeführt, so daß eine weitgehende Vergleichmäßigung des dem Kühlrohr zugeführten Luftstromes in räumlicher und zeitlicher Hinsicht möglich ist. Nachteilig ist bei dieser letztgenannten Anblastechnologie, daß aufwendige apparative und verfahrensmäßige Maßnahmen erforderlich sind, um einen zeitlichen und über die Länge sehr gleichmäßigen, d.h. wirbelfreien Luftstrom auf das Chemiefaserbündel zu erzielen.To avoid quality fluctuations in the cooling of the threads below the spinnerets, porous or perforated cooling tubes have previously been used, which are the subject of DE-A 34 06 347 (Bag. 1326) and DE-A 34 24 253.8-26 (Bag. 1419) ) are. Reference can also be made to DE-A 37 41 135 (Bag. 1558) and DE-A 39 23 067 (Bag. 1648). Here, however, the cooling air is supplied in a defined manner by a blower, so that the air flow supplied to the cooling pipe can be largely homogenized in terms of space and time. A disadvantage of this latter blowing technology is that complex apparatus and procedural measures are required in order to achieve a time-uniform and, over the length, very even, ie, vortex-free, air flow onto the chemical fiber bundle.

Durch die GB-A-1,088,240 wurde ein Verfahren zum Verspinnen eines faserformenden Polymers bekannt, bei dem in einem unter der Spinndüse vorgesehenen Kühlrohr Einbauten zur Beruhigung der eingesaugten Luftströmung vorgesehen sind.GB-A-1,088,240 discloses a method for spinning a fiber-forming polymer, in which internals are provided in a cooling tube provided under the spinneret for calming the air flow drawn in.

Die Aufgabe der Erfindung besteht darin, die bekannte Spinnvorrichtung so auszugestalten, daß mit einfachen Mitteln eine gute Laufruhe der Chemiefasern erzielt und Chemiefasern großer Längs-Gleichmäßigkeit erzeugt werden.The object of the invention is to design the known spinning device so that a simple the chemical fibers run smoothly and chemical fibers with great longitudinal uniformity are produced.

Die Lösung ergibt sich aus dem Kennzeichen des Anspruches 1.The solution results from the characterizing part of claim 1.

Bei der bekannten Vorrichtung wird der radiale Luftstrom dadurch erzeugt, daß die mit hoher Geschwindigkeit laufenden Chemiefasern einen Unterdruck in dem Rohr erzeugen. Die Erfindung ermöglicht demgegenüber die Einstellung guter Strömungsund Kühlungsverhältnisse mit geringem Aufwand.In the known device, the radial air flow is generated in that the chemical fibers running at high speed create a negative pressure in the tube. In contrast, the invention enables good flow and cooling conditions to be set with little effort.

Zur Gewährleistung gleichmäßiger Strömungsverhältnisse in dem Kühlrohr dient zusätzlich die Maßnahme nach Anspruch 3. Durch diese Maßnahmen wird nicht nur verhindert, daß die von dem Faserbündel mitgeschleppten Luftwirbel zurückströmen in den Bereich des Kühlrohres und zu einer ungleichmäßigen Beaufschlagung des Kühlrohrs mit atmosphärischer Luft führen. Es wird vielmehr auch verhindert, daß Druckschwankungen und Druckwellen sich in den Einzugsbereich des Kühlrohres fortpflanzen.To ensure uniform flow conditions in the cooling tube, the measure according to claim 3 is also used. These measures not only prevent the air vortices entrained by the fiber bundle from flowing back into the area of the cooling tube and leading to an uneven exposure of the cooling tube to atmospheric air. Rather, it also prevents pressure fluctuations and pressure waves from propagating into the intake area of the cooling tube.

Der vorgeschlagene Luftkasten ist mit der Atmosphäre verbunden. Man kann sich auch den Anschluß an ein vorgekühltes Medium vorstellen. Jedenfalls ist der Luftkasten so ausgestaltet, daß in ihm im wesentlichen atmosphärischer Druck oder Unterdruck herrscht. Hierzu können an einer oder mehreren Stellen definierte Öffnungen vorgesehen sein. Durch eine Zwischenwand kann verhindert werden, daß die einströmende Luft unmittelbar den Außenumfang des Kühlrohres beaufschlagt. Der Luftkasten kann von einer Mehrzahl von Kühlrohren, die jeweils einer Spinndüse zugeordnet sind, durchdrungen werden. Hierdurch gelingt es, für die Mehrzahl der Kühlrohre gleiche Kühlbedingungen herzustellen und auf diese Weise untereinander gleiche und gleichmäßige Chemiefasern zu erzeugen.The proposed air box is connected to the atmosphere. One can also imagine the connection to a pre-cooled medium. In any case, the air box is designed so that there is essentially atmospheric pressure or vacuum. For this purpose, defined openings can be provided at one or more points. An intermediate wall can be used to prevent the inflowing air from acting directly on the outer circumference of the cooling tube. The air box can be penetrated by a plurality of cooling tubes, each of which is assigned to a spinneret. This makes it possible to produce the same cooling conditions for the majority of the cooling tubes and in this way to one another to produce the same and uniform chemical fibers.

Es sei noch einmal hervorgehoben, daß in allen diesen Fällen der Luftkasten nicht an ein Gebläse angeschlossen wird, mit dem in dem Luftkasten ein - wenn auch geringer - Luftüberdruck erzeugt wird. Vielmehr wird zur Luftzufuhr die Tatsache genutzt, daß ein Druckgradient entsteht, der aus dem Spinnraum in den Luftkasten und von dort in das Kühlrohr gerichtet ist.It should be emphasized once again that in all these cases the air box is not connected to a blower with which an air pressure, albeit low, is generated in the air box. Rather, the fact that a pressure gradient arises which is directed from the spinning chamber into the air box and from there into the cooling tube is used for the air supply.

Es können Maßnahmen vorgesehen werden, um die von außen nach innen in das Kühlrohr eingesogenen Luftströmungen zu dirigieren. Dies kann insbesondere durch Leitringe geschehen, die an der Innenwand des Kühlrohres in einer oder mehreren Normalebenen angebracht und im wesentlichen radial nach innen gerichtet sind. Selbstverständlich lassen diese Leitrinae im Zentrum des Kühlrohres eine Durchtrittsöffnung für das Chemiefaserbündel frei. Bei der Ausgestaltung nach Anspruch 3 erreicht man neben der zweckmäßigen Umlenkung des Luftstromes auch, daß auf der Unterseite der Leitringe ein Unterdruck entsteht, der zur Vor-Ansaugung der Außenluft führt. Im folgenden wird die Erfindung anhand von Ausführungsbeispielen beschrieben:Measures can be provided to direct the air currents drawn into the cooling tube from the outside in. This can be done in particular by guide rings which are attached to the inner wall of the cooling tube in one or more normal planes and are directed essentially radially inwards. Of course, these guide lines leave a passage opening for the chemical fiber bundle in the center of the cooling tube. In the embodiment according to claim 3, in addition to the appropriate deflection of the air flow, a vacuum is also created on the underside of the guide rings, which leads to pre-suction of the outside air. The invention is described below using exemplary embodiments:

Durch die Ausgestaltung nach Anspruch 6 kann man in dem Luftkasten einen definierten Unterdruck erzeugen und dadurch die dem Faden zugeführte Luftmenge steuern. Hierdurch läßt sich die Kühlwirkung dem Bedarf und den technologischen Notwendigkeiten anpassen.Due to the configuration according to claim 6, a defined vacuum can be generated in the air box and the air quantity supplied to the thread can thereby be controlled. As a result, the cooling effect can be adapted to the needs and technological needs.

Es zeigen:

Fig. 1
eine Spinnvorrichtung mit Abschirmblech;
Fig. 2
eine Spinnvorrichtung mit Abschirmkasten;
Show it:
Fig. 1
a spinning device with shielding plate;
Fig. 2
a spinning device with shielding box;

Bei den gezeigten Ausführungsbeispielen wird eine PolymerSchmelze durch eine Schmelzeleitung 1 dem sogenannten Spinnkopf 2 zugeleitet. Der Spinnkopf 2 enthält insbesondere eine (nicht dargestellte) Spinnpumpe, durch welche eine dosierte Menge der Schmelze der Spinndüse 3 zugeführt wird. Die Spinndüse 3 ist eine Platte mit einer Vielzahl von Austrittsbohrungen. Aus jeder Austrittsbohrung tritt ein Filament 4 aus. Die Filamente 4 werden durch einen Fadenführer 7 zu einem Faden zusammengefaßt. Durch eine Changiereinrichtung 8 - hier ausgeführt als Flügelchangierung mit Leitlinial - wird der Faden bei teilweiser Umschlingung einer Meßwalze 9 der Aufwickelspule 10 zugeführt. Die Aufwickelspule 10 wird auf einer Spulhülse 12 gebildet. Die Spulhülse 12 ist auf einer drehend angetriebenen Spindel 11 aufgespannt. Bei dem Ausführungsbeispiel nach Figur 2 werden auf einer Spindel 11 vier Hülsen 12 aufgespannt und gleichzeitig vier Fäden zu jeweils einer Spule 10 aufgewickelt.In the exemplary embodiments shown, a polymer melt is fed through a melt line 1 to the so-called spinning head 2. The spinning head 2 contains in particular a (not shown) spinning pump, through which a metered amount of the melt is fed to the spinning nozzle 3. The spinneret 3 is a plate with a plurality of outlet bores. A filament 4 emerges from each outlet bore. The filaments 4 are combined into a thread by a thread guide 7. By means of a traversing device 8 - here designed as wing traversing with a guide line - the thread is fed to the take-up spool 10 with a partial wrap around a measuring roller 9. The take-up spool 10 is formed on a winding tube 12. The winding tube 12 is clamped on a rotatably driven spindle 11. In the embodiment according to FIG. 2, four sleeves 12 are clamped on a spindle 11 and at the same time four threads are wound up to form a bobbin 10.

Allen Ausführungsbeispielen ist gemeinsam, daß die Filamente 4 zunächst im offenen Zustand, d. h. vor dem Fadenführer 7, durch ein Kühlrohr 5 geleitet werden. Das Kühlrohr 5 schließt sich unmittelbar an die Spinndüse 3 an. Das Kühlrohr 5 ist porös. Es hat eine Länge von 0,5 bis 2,0 Metern. An das Austrittsende des Kühlrohres 5 legt sich ein Abschirmblech 6 an. Das Abschirmblech 6 weist eine Durchtrittsöffnung für das Filamentbündel auf, dessen Weite gleich oder kleiner als die lichte Weite des Kühlrohres 5 ist.All of the exemplary embodiments have in common that the filaments 4 are initially in the open state, ie. H. in front of the thread guide 7, are passed through a cooling tube 5. The cooling tube 5 connects directly to the spinneret 3. The cooling tube 5 is porous. It has a length of 0.5 to 2.0 meters. At the outlet end of the cooling tube 5, a shielding plate 6 is applied. The shielding plate 6 has a passage opening for the filament bundle, the width of which is equal to or less than the inside width of the cooling tube 5.

In allen Ausführungsbeispielen ist dargestellt, daß die Porosität des Kühlrohres 5 in Fadenlaufrichtung zunimmt. Erfindungsgemäß ist die Porosität im wesentlichen proportional, zumindest aber abhängig von der Fadenlaufgeschwindigkeit. Die Fadenlaufgeschwindigkeit - oder richtiger gesagt: die Laufgeschwindigkeit der Filamente - ist sehr charakteristisch und zeichnet sich dadurch aus, daß sie zunächst verhältnismäßig niedrig ist und sodann sehr stark zunimmt. Die Porosität kann auch dem Temperaturverlauf angepaßt sein, den die Filamente über ihre Länge haben. In beiden geschilderten Fällen nimmt die Porosität in Fadenlaufrichtung zu, d. h. die Luftdurchlässigkeit wird größer.In all exemplary embodiments it is shown that the porosity of the cooling tube 5 increases in the direction of the thread. According to the invention, the porosity is essentially proportional, but at least depends on the thread running speed. The Thread speed - or more correctly: the speed of the filaments - is very characteristic and is characterized by the fact that it is initially relatively low and then increases very rapidly. The porosity can also be adapted to the temperature profile that the filaments have over their length. In both of the cases described, the porosity increases in the thread running direction, ie the air permeability increases.

Das Ausführungsbeispiel nach Figur 1 weist die Besonderheit auf, daß eine vielzahl von Leitringen 17 in dem Kühlrohr angeordnet sind. Die Leitringe 17 sind ringförmige Bleche. Diese ringförmigen Bleche werden mit ihrem Außenumfang an dem Kühlrohr 5 befestigt und weisen mit ihrer inneren Kante in Fadenlaufrichtung, sind also nach unten geneigt. Diese Leitringe 17 leiten die eingesaugten Luftströmungen nach unten, bewirken aber auch, daß unter ihnen ein Unterdruck entsteht, so daß sich hierdurch eine Ansaugwirkung ergibt.The exemplary embodiment according to FIG. 1 has the special feature that a large number of guide rings 17 are arranged in the cooling tube. The guide rings 17 are annular sheets. These annular sheets are fastened with their outer circumference to the cooling tube 5 and point with their inner edge in the thread running direction, that is to say they are inclined downwards. These guide rings 17 guide the sucked-in air currents downward, but also cause a negative pressure to develop beneath them, so that this results in a suction effect.

Die Fadenlaufgeschwindigkeit beträgt mehr als 6000 m/min.The thread speed is more than 6000 m / min.

Claims (6)

  1. Spinning device for spinning synthetic yarns (4), wherein the yarns (4) are withdrawn from the spinneret (3) and - below the spinneret for cooling purposes - are passed through a perforated or porous cooling tube (5) and wherein the yarns are exposed to the air stream flowing from outside into the cooling tube (5), and with atmospheric air pressure prevailing at the outside of the cooling tube,
    characterized in that
    for spinning of the yarns (4) at a speed of 6000 m/min and more, during which the yarns (4) are at least partially drawn, tnere is fixed to one outlet of the cooiing tube (5) a shielding wall (6), which is aligned at right angles to the cooling tube (5), penetrates the end of the cooling tube (5) and has a through opening having a width equal to or smaller than the inside width of the cooling tube (5) for the filament bundle forming the yarn (4).
  2. Device according to claim 1,
    characterized in that
    the air permeability or porosity of the cooling tube (5) increases in yarn-running direction substantially in proportion to the running speed of the filaments (4) which increases as the distance from the spinneret (3) increases.
  3. Device according to claim 1 or 2,
    characterized in that
    in the cooling tube (5) and fastened in one or more normal planes to its inner wall guide rings (17) are disposed which slope in yarn-running direction out from the inner wall.
  4. Device according to one of claims 1 to 3,
    characterized in that
    the shielding wall (6) is the bottom wall of an air box (16), which is penetrated from top to bottom by the cooling tube (5), the cooling tube being fitted in a substantially airtight manner by its inlet end into the top wall and by its outlet end into the bottom wall of the air box (16), and
    that the air box (16) has one or more air supply openings (13).
  5. Device according to claim 4,
    characterized in that
    the air box (16) is penetrated by a plurality of cooling tubes (5) each of which is associated with one spinneret (3).
  6. Device according to claim 4 or 5,
    characterized in that
    the air supply openings (13) of the air box (16) are provided with adjustable throttles (14) or restrictor orifices.
EP93108161A 1992-06-13 1993-05-19 Device for spinning synthetic yarns Expired - Lifetime EP0580977B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4219463 1992-06-13
DE4219463 1992-06-13
DE9306510U DE9306510U1 (en) 1992-06-13 1993-04-30 Spinning device for spinning synthetic threads

Publications (2)

Publication Number Publication Date
EP0580977A1 EP0580977A1 (en) 1994-02-02
EP0580977B1 true EP0580977B1 (en) 1997-09-24

Family

ID=25915676

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108161A Expired - Lifetime EP0580977B1 (en) 1992-06-13 1993-05-19 Device for spinning synthetic yarns

Country Status (6)

Country Link
EP (1) EP0580977B1 (en)
JP (1) JPH0657518A (en)
KR (1) KR950010742B1 (en)
CN (1) CN1031469C (en)
DE (2) DE9306510U1 (en)
ES (1) ES2106916T3 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG67284A1 (en) * 1991-09-06 1999-09-21 Akzo Nobel Nv Apparatus for high speed spinning multifilament yarns and use thereof
BR9400682A (en) * 1993-03-05 1994-10-18 Akzo Nv Apparatus for the fusing spinning of multifilament yarns and their application
KR960012828B1 (en) * 1993-04-30 1996-09-24 바마크 악티엔게젤샤프트 Drawing process
TW268054B (en) * 1993-12-03 1996-01-11 Rieter Automatik Gmbh
US5976431A (en) * 1993-12-03 1999-11-02 Ronald Mears Melt spinning process to produce filaments
DE19535143B4 (en) * 1994-09-30 2006-02-16 Saurer Gmbh & Co. Kg Apparatus and method for the thermal treatment of fibers
DE19716394C1 (en) * 1997-04-18 1998-09-03 Inventa Ag Cooling control unit, for thermoplastic filament bundle from spinneret(s)
EP1090170B1 (en) 1998-06-22 2004-08-18 Saurer GmbH & Co. KG Spinner for spinning a synthetic thread
KR100305668B1 (en) * 1999-09-13 2001-09-24 조민호 Multifilament Quenching Apparatus
JP2002309431A (en) * 2000-06-21 2002-10-23 Toray Eng Co Ltd Spinning apparatus
JP5332253B2 (en) * 2008-03-25 2013-11-06 東レ株式会社 Filament yarn manufacturing apparatus and manufacturing method
CN101776076A (en) * 2010-03-14 2010-07-14 苏州工业园区华西泵业有限公司 Metering unit of spinning pump test bench
CN101782061A (en) * 2010-03-14 2010-07-21 苏州工业园区华西泵业有限公司 Spinning pump test bed
CN115434025B (en) * 2022-08-04 2023-10-20 南通文凯化纤有限公司 Forming device for graphene filament fibers

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Publication number Priority date Publication date Assignee Title
GB774814A (en) * 1954-10-21 1957-05-15 Thuringisches Kunstfaserwerk W Process of and apparatus for the melt-spinning of synthetic products
GB1088240A (en) * 1965-08-20 1967-10-25 Ici Ltd Melt spinning of fibre-forming polymers
NL6701693A (en) * 1966-02-09 1967-08-10
GB1220424A (en) * 1968-03-21 1971-01-27 Toray Industries Method and apparatus for melt-spinning synthetic fibres
US3611485A (en) * 1968-12-30 1971-10-12 Monsanto Co Spinning chimney
SG67284A1 (en) * 1991-09-06 1999-09-21 Akzo Nobel Nv Apparatus for high speed spinning multifilament yarns and use thereof

Also Published As

Publication number Publication date
ES2106916T3 (en) 1997-11-16
DE9306510U1 (en) 1993-06-09
DE59307414D1 (en) 1997-10-30
CN1080335A (en) 1994-01-05
CN1031469C (en) 1996-04-03
KR940000623A (en) 1994-01-03
JPH0657518A (en) 1994-03-01
EP0580977A1 (en) 1994-02-02
KR950010742B1 (en) 1995-09-22

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